I loved this place! Made me feel at home for a bit over a week.
Stylish space with very comfortable bed (not always a given in Thailand), a sizeable very nice bathroom, a comfy seat to chill in and a small desk. There is also a small kitchen with a refridgerator.
It's centrally located with multiple transportation options nearby. The closest is the canal ferry within a 2min walk, the MRT is about a 10 minute walk away and the BTS about 15mins. Also there is a motorcycle taxi stand right across the street. Some of the popular restaurants and bars on Sukhumvit 11 are about a 10 min walk away.
As other reviewers have noted, the apartment is on the 3rd floor so you need to walk up a few (narrow) stairs, but that wasn't a problem for me.
Very easy checkin and checkout and very good and timely communication.